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Lab Multiple Choice
| Question | Answer |
|---|---|
| What are the steps in the scientific method? | Observation, Hypothesis, Experiment, Analysis of Data, & Conclusions |
| observation | include personal observations made by the investigator, as well as previous observations and information gathered by others. |
| hypothesis | Allows the investigator to develop a possible explanation. |
| experiment | predictions that can be tested by additional observations |
| control | undergoes the entire experiment, but it lacks the factor that is being tested. |
| data | is collected information as conducted during the experiment |
| conclusion | well defined hypothesis |
| What is a control and why is it important | A control undergoes the entire experiment, but it lacks the factor that is being tested. It ensures that an experiment is valid. |
| How do we convert units, for example from milligrams to grams? | Move the decimal place one position to the right for each step moved. |
| How do we convert temperatures from the Fahrenheit scale to Celsius scale | F=1.8(C)+32 |
| How many centimeters are in one inch | 2.54 cm=1 in |
| What is accuracy | Accuracy refers to how close a measured value is to actual, true value of the property being studied |
| what is precision | Precision refers to the repeatability of the measurements and whether you would get an identical measurement every time yo used the instrument to measure the same object. |
| What is a meniscus and how do we read it properly | The "U" shape at the top & keep your eye level with the meniscus |
| What is the proper procedure for operating the electronic balance? | Make sure the balance is on a level surface. Check the leveling bubble to ensure that this is the case. Make sure the pan is clean and free of debris. Turn on the balance and wait for the display to initialize. |
| What are the two types of microscopes that we talked about during the lab? | Compound light microscope & stereoscope/dissecting microscope |
| How do we calculate the total magnification? | Calculated by multiplying the magnification of the objective lens times the magnification of the ocular lens |
| What tests did we perform and what reagents were used for each test | Benedicts test-Blue Iodine Test-brown Biuret Test-violet |
| What biological molecule does each reagent detect? | Simple Sugars, Starch, Proteins |
| What are the building blocks of those molecules | Simple sugars- Monosaccharaides Starch-Polysaccharides Proteins-Peptide Bonds |
Created by:
cstinson
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